Chapter 6

Module 6.2

In this chapter we explain what power is, how it is determined, and how we can use power analysis to determine what sample size we need, the level at which to randomize, how many different treatment groups we can test, and many other design issues.

Running Randomized Evaluations: A Practical Guide

This book provides a comprehensive yet accessible guide to running randomized impact evaluations of social programs. Drawing on the experience of researchers at the J-PAL, which has run hundreds of such evaluations in dozens of countries throughout the world, it offers practical insights on how to use this powerful technique, especially in resource-poor environments.